sometimes it happens by movements like civil rights movement or getting the right to vote for women in this country, and sometimes it has to come from top-down change. when that top-down change is perceived to be efficiently enforced, then the exploiter has to adapt. what you see with forms of slavery today there are laws, there are penalties. buy and large they are not perceived to be efficiently enforced, so that the exploiter doesn't have to adapt too much or just enough evade identification. >> thank you for a stimulating presentation. i want to get your reaction to the idea in general terms that maybe the diagnosis is only as good as the remedy it prescribes. as a more particular way of asking that question, i'd like to hear you say what your study of the shrimp supply chain suggests about appropriate remedy for the exploitation that we're seeing there. and secondly, in more conceptual terms, all related to remedies. if you excuse me asking more than one question relating to different parts of your presentation. secondly, whether in conceptual terms it might not make more sense to